<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form action="/user/add" method="post" enctype="multipart/form-data">
    用户名：<input type="text" id="userName"><br>
    头像：<input type="file" name="face" id="face"><br>
    <input type="submit" value="提交">
</form>
</body>
</html>